They may have come from the old company California Moparts... California Suspension. I had a few different size sets of TBs from them and, if I remember going back into the mid-1980s, they were all white powder coated... my current 1.24" from them are white powder coated.

This company was ahead of its times and unfortunately couldn't survive back then... out-of-business by about 1990. They actually raced oval track events with Mopars.

Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!